#include "stdafx.h"

/*  -- translated by f2c (version 19940927).
   You must link the resulting object file with the libraries:
	-lf2c -lm   (in that order)
*/

#include "hnum_f2c.h"
namespace harlinn
{
    namespace numerics
    {
        namespace SuperLU
        {
            /* Subroutine */ 
            int sger_(integer *m, integer *n, real *alpha, real *x, integer *incx, real *y, integer *incy, real *a, integer *lda)
            {


                /* System generated locals */
                integer a_dim1, a_offset, i__1, i__2;

                /* Local variables */
                static integer info;
                static real temp;
                static integer i, j, ix, jy, kx;
                    


            /*  Purpose   
                =======   

                SGER   performs the rank 1 operation   

                    A := alpha*x*y' + A,   

                where alpha is a scalar, x is an m element vector, y is an n element 
  
                vector and A is an m by n matrix.   

                Parameters   
                ==========   

                M      - INTEGER.   
                            On entry, M specifies the number of rows of the matrix A.   
                            M must be at least zero.   
                            Unchanged on exit.   

                N      - INTEGER.   
                            On entry, N specifies the number of columns of the matrix A. 
  
                            N must be at least zero.   
                            Unchanged on exit.   

                ALPHA  - REAL            .   
                            On entry, ALPHA specifies the scalar alpha.   
                            Unchanged on exit.   

                X      - REAL             array of dimension at least   
                            ( 1 + ( m - 1 )*abs( INCX ) ).   
                            Before entry, the incremented array X must contain the m   
                            element vector x.   
                            Unchanged on exit.   

                INCX   - INTEGER.   
                            On entry, INCX specifies the increment for the elements of   
                            X. INCX must not be zero.   
                            Unchanged on exit.   

                Y      - REAL             array of dimension at least   
                            ( 1 + ( n - 1 )*abs( INCY ) ).   
                            Before entry, the incremented array Y must contain the n   
                            element vector y.   
                            Unchanged on exit.   

                INCY   - INTEGER.   
                            On entry, INCY specifies the increment for the elements of   
                            Y. INCY must not be zero.   
                            Unchanged on exit.   

                A      - REAL             array of DIMENSION ( LDA, n ).   
                            Before entry, the leading m by n part of the array A must   
                            contain the matrix of coefficients. On exit, A is   
                            overwritten by the updated matrix.   

                LDA    - INTEGER.   
                            On entry, LDA specifies the first dimension of A as declared 
  
                            in the calling (sub) program. LDA must be at least   
                            max( 1, m ).   
                            Unchanged on exit.   


                Level 2 Blas routine.   

                -- Written on 22-October-1986.   
                    Jack Dongarra, Argonne National Lab.   
                    Jeremy Du Croz, Nag Central Office.   
                    Sven Hammarling, Nag Central Office.   
                    Richard Hanson, Sandia National Labs.   



                    Test the input parameters.   

    
                Parameter adjustments   
                    Function Body */
            #define X(I) x[(I)-1]
            #define Y(I) y[(I)-1]

            #define A(I,J) a[(I)-1 + ((J)-1)* ( *lda)]

                info = 0;
                if (*m < 0) {
	            info = 1;
                } else if (*n < 0) {
	            info = 2;
                } else if (*incx == 0) {
	            info = 5;
                } else if (*incy == 0) {
	            info = 7;
                } else if (*lda < max(1,*m)) {
	            info = 9;
                }
                if (info != 0) {
	            xerbla_("SGER  ", &info);
	            return 0;
                }

            /*     Quick return if possible. */

                if (*m == 0 || *n == 0 || *alpha == 0.f) {
	            return 0;
                }

            /*     Start the operations. In this version the elements of A are   
                    accessed sequentially with one pass through A. */

                if (*incy > 0) {
	            jy = 1;
                } else {
	            jy = 1 - (*n - 1) * *incy;
                }
                if (*incx == 1) {
	            i__1 = *n;
	            for (j = 1; j <= *n; ++j) {
	                if (Y(jy) != 0.f) {
		            temp = *alpha * Y(jy);
		            i__2 = *m;
		            for (i = 1; i <= *m; ++i) {
		                A(i,j) += X(i) * temp;
            /* L10: */
		            }
	                }
	                jy += *incy;
            /* L20: */
	            }
                } else {
	            if (*incx > 0) {
	                kx = 1;
	            } else {
	                kx = 1 - (*m - 1) * *incx;
	            }
	            i__1 = *n;
	            for (j = 1; j <= *n; ++j) {
	                if (Y(jy) != 0.f) {
		            temp = *alpha * Y(jy);
		            ix = kx;
		            i__2 = *m;
		            for (i = 1; i <= *m; ++i) {
		                A(i,j) += X(ix) * temp;
		                ix += *incx;
            /* L30: */
		            }
	                }
	                jy += *incy;
            /* L40: */
	            }
                }

                return 0;

            /*     End of SGER  . */

            } /* sger_ */

        };
    };
};